<template>
	<div>
		<!-- 面包屑导航区域 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
		  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
		  <el-breadcrumb-item>商品管理</el-breadcrumb-item>
		  <el-breadcrumb-item>添加商品</el-breadcrumb-item>
		</el-breadcrumb>
		<!-- 卡片视图区域 -->
		<el-card>
			<!-- 提示区域 -->
			 <el-alert
			    title="添加商品区域"
			    type="info"
			    center
			    show-icon :closable="false">
			  </el-alert>
			  <!-- 步骤条区域 -->
			  <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
			    <el-step title="基本信息"></el-step>
			    <el-step title="商品参数"></el-step>
			    <el-step title="商品属性"></el-step>
			    <el-step title="商品图片"></el-step>
			    <el-step title="商品内容"></el-step>
			    <el-step title="完成"></el-step>
			  </el-steps>
			  <!-- tab栏区域  -->
			  <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
			   <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeLeave" @tab-click="tabClicked">
			      <el-tab-pane label="基本信息" name="0">
					  <el-form-item label="商品名称" prop="goods_name">
						  <el-input v-model="addForm.goods_name"></el-input>
					  </el-form-item>
					  <el-form-item label="商品价格" prop="goods_price">
					  	<el-input v-model="addForm.goods_price" type="number"></el-input>
					  </el-form-item>
					  <el-form-item label="商品重量" prop="goods_weight">
						  <el-input v-model="addForm.goods_weight" type="number"></el-input>
					  </el-form-item>
					  <el-form-item label="商品数量" prop="goods_number">
						  <el-input v-model="addForm.goods_number" type="number"></el-input>
					  </el-form-item>	
						<el-form-item label="商品分类" prop="goods_cat">
							 <el-cascader
							    expand-trigger="hover"
							    v-model="addForm.goods_cat"
							    :options="catelist"
							    :props="cateProps"
							    @change="handleChange"></el-cascader>
						</el-form-item>			
				  </el-tab-pane>
			      <el-tab-pane label="商品参数" name="1">
					  <!-- 渲染表单的Item项 -->
					  <el-form-item :label="item.attr_name" v-for="item in manyTableData":key="item.attr_id">
						  <!-- 复选框组 -->
						  <el-checkbox-group v-model="item.attr_vals">
						      <el-checkbox :label= "cb"
							  v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
						    </el-checkbox-group>
					  </el-form-item>
				  </el-tab-pane>
			      <el-tab-pane label="商品属性" name="2">
					  <el-form-item :label="item.attr_name" v-for="item in onlyTableData"
					  :key="item.attr_id">
					  <el-input v-model="item.attr_vals"></el-input>
					  </el-form-item>
				  </el-tab-pane>
			      <el-tab-pane label="商品图片" name="3">
					  <!-- action 表示图片要上传到的后台API地址 -->
					  <el-upload
					    :action="uploadURL"
					    :on-preview="handlePreview"
					    :on-remove="handleRemove"
					    list-type="picture"
					    :headers="headerObj"
						:on-success="handleSuccess">
					    <el-button size="small" type="primary">点击上传</el-button>
					  </el-upload>
				  </el-tab-pane>
			      <el-tab-pane label="商品内容" name="4">
					  <!-- 富文本编辑器组件 -->
					  <quill-editor v-model="addForm.goods_introduce"></quill-editor>
				      <!-- 添加商品的按钮 -->
					  <el-button type="primary" style="margin-top: 15px;" @click="add">添加商品</el-button>
				  </el-tab-pane>
			    </el-tabs>
			   </el-form>
		</el-card>
		
		<!--图片预览  -->
		<el-dialog
		  title="图片预览"
		  :visible.sync="previewVisible"
		  width="50%">
		  <img :src="previewPath" alt="" class="previewImg"/>	  
		</el-dialog>

	</div>
</template>

<script>
	import _ from 'lodash'
	
	export default{
		data(){
			return {
				activeIndex: '0',
				//添加商品的表单数据对象
				addForm:{
					goods_name:'',
					goods_price:0,
					goods_weight: 0,
					goods_number:0,
					//商品所属的分类数组
					goods_cat:[],
					//图片的数组
					pics:[],
					//商品的详情描述
					goods_introduce:'',
					attrs:[]
				},
				addFormRules:{
					goods_name:[
						{required:true,message:'请输入商品名称',trigger:'blur'},
					],
					goods_price:[
						{required:true,message:'请输入商品价格',trigger:'blur'},
					],
					goods_weight:[
						{required:true,message:'请输入商品重量',trigger:'blur'},
					],
					goods_number:[
						{required:true,message:'请输入商品数量',trigger:'blur'},
					],
					goods_cat:[
						{required:true,message:'请选择商品分类',trigger:'blur'},
					]					
				},
				// 商品分类列表
				catelist:[],
				cateProps:{
					value: 'cat_id',
					label: 'cat_name',
					children: 'children'
				},
				//动态参数列表数据
				manyTableData:[],
				// 静态属性列表数据
				onlyTableData:[],
				//上传图片的URL地址
				uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
				//图片上传组件的headers请求头对象
				headerObj:{
					Authorization:window.sessionStorage.getItem('token')
				},
				previewPath:'',
				previewVisible: false
			}
		},
		created(){
			this.getCateList()
		},
		methods:{
			//获取所有商品分类数据
			async getCateList(){
				const { data: res} = await this.$http.get('categories')
				if(res.meta.status !==200){
					return this.$message.error('获取商品分类数据失败')
				}
				this.catelist = res.data
				console.log(this.catelist)
			},
			//级联选择器变化会触发这个函数
			handleChange(){
				console.log(this.addForm.goods_cat)
				if(this.addForm.goods_cat.length !==3){
					this.addForm.goods_cat = []
				}
			},
			beforeLeave(activeName,oldActiveName){
				// console.log("即将离开的标签页名字是："+ oldActiveName)
				// console.log("即将进入的标签页名字是："+ activeName)
				if(oldActiveName === '0'&&this.addForm.goods_cat.length!==3){
					this.$message.error('请先选择商品分类！')
					return false
				}
			},
			async tabClicked(){
				//console.log(this.activeIndex)
				//证明访问的是动态参数面板
				if(this.activeIndex==='1'){
					const { data: res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
						params:{sel:'many'}
					})
					
					if(res.meta.status !==200){
						return this.$message.error('获取动态参数列表失败！')
					}
					
					console.log(res.data)
					res.data.forEach(item=>{
						item.attr_vals =
						item.attr_vals.length===0 ? []
						: item.attr_vals.split(' ')
					})
					this.manyTableData = res.data 
				}else if(this.activeIndex === '2')
				{
					const { data: res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
						params:{sel:'only'}
					})
					
					if(res.meta.status !==200){
						return this.$message.error('获取静态属性失败！')
					}
					console.log((res.data))
					this.onlyTableData = res.data
				}
			},
			//处理图片预览效果
			handlePreview(file){
				console.log(file)
				this.previewPath = file.response.data.url
				this.previewVisible = true
			},
			//处理移除图片的操作
			handleRemove(file){
				//console.log(file)
				//1、获取将要删除的图片的临时路径
				const filePath = file.response.data.tmp_path
				//2、从pics数组中，找到这个图片对应的索引值
				const i= this.addForm.pics.findIndex(x => x.pic === filePath)
				//3、调用数组的splice方法，把图片信息对象，从pics数组中移除
				this.addForm.pics.splice(i,1)
				console.log(this.addForm)
			},
			//监听图片上传成功的事件
			handleSuccess(response){
				console.log(response)
				//1、拼接得到一个图片信息对象
				const picInfo = {pic:response.data.tmp_path}
				//2、将图片信息对象push到pics数组中
				this.addForm.pics.push(picInfo)
				console.log(this.addForm)
			},
			// 添加商品
			add(){
				this.$refs.addFormRef.validate(async valid=>{
					if(!valid){
						return this.$message.error('请填写必要的表单项！')
					}
					//执行添加的业务逻辑
					// lodash cloneDeep(obj)
					const form= _.cloneDeep(this.addForm)
					form.goods_cat=form.goods_cat.join(',')
					// 处理动态参数
					this.manyTableData.forEach(item =>{
						const newInfo ={
							attr_id:item.attr_id,
							attr_value:item.attr_vals.join(' ')
						}
						this.addForm.attrs.push(newInfo)
					})
					// 处理静态属性
					this.onlyTableData.forEach(item =>{
						const newInfo={
							attr_id:item.attr_id,
							attr_value:item.attr_vals						
						}
						this.addForm.attrs.push(newInfo)
					})
					form.attrs=this.addForm.attrs
					console.log(form)
					// 发起请求添加商品
					//商品的名称必须是唯一的
					const { data: res} = await this.$http.post('goods',form)
					if(res.meta.status !==201){
						return this.$message.error('添加商品失败！')
					}
					this.$message.success('添加商品成功！')
					this.$router.push('/goods')
				})
			}
		},
	    computed:{
			cateId(){
				if(this.addForm.goods_cat.length===3){
					return this.addForm.goods_cat[2]
				}
				return null
			}
		}
	}
</script>

<style>
	.el-checkbox{
		margin: 0 10px 0 0 !important ;
	}
	.previewImg{
		width: 100%;
	}	
</style>
